+1 would love this feature !!
It’s not only about Sega 3d games (eg OutRun 3D on the SMS): there are also Famicom 3D games (eg Rad Racer), 3D DVD movies…
Converting 3D frame sequential (for progressive input material) (or field / line alternative for interlaced input) to HDMI top-bottom 3D seems in line with ossc’s zero latency.
With a 60hz input, the output would be two pictures with half the normal vertical resolution one above the other, either at 30fps fully updated, or 60fps with only one of the two pictures updated alternatively
It would be a unique feature !!